Ink-roller trip for printing-presses.



'PATENTED SEPT. 8, 1908.

C. L. JOHNSTON. INK ROLLER TRIP FOR PRINTING PRESSES.

APPLICATION FILED JAN. 15,1906.

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PA'TENTED SEPT. a, 1908.

G. L. JOHNSTON. INK ROLLER TRIP FOR PRINTING PRESSES.

APPLICATION FILED JAN.15,1906.

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n I, \Nw m I I" M Wbzasses 'mzwomzls PETERS ca, wasmucrorv. 04 c UNITEDSTATES CLARENCE L. JOHNSTON,

OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO FRANK BROWN REDINGTON, OFCHICAGO, ILLINOIS.

INK-ROLLER TRIP FOR PRINTING-PRESSES.

Specification of Letters Patent.

Patented Sept. 8, 1908.

Application filed January 15, 1906. Serial No. 296,116.

T 0 all whom it may concern:

Be it known that I, CLARENCE L. Jor-ms- TON, a citizen of the UnitedStates, residing in the city and county of San Francisco and State ofCalifornia, have invented new and useful Improvements in Ink-RollerTrips for Printing-Presses, of which the following is a specification.

My invention relates to printing presses and pertains especially to anattachment for a printing press of the character employing areciprocating type-bed and a co-acting impression cylinder movableintermittently to and from the type-bed.

Its object is to provide a simple, practical means for governing thefeed of ink to the form so that the feed of ink from the fountain may beautomatically discontinued when the impression cylinder is set-up to itshighest point and no paper is passing through the machine, although themachine may still continue to run. If the ink distributing rollers areallowed to continue to receive ink from the fountain when the machine isrunning, but with no rinting going on, they will collect undesirab ythick layers of ink on them and smear up and clog the type on the form,all of which is very objectionable. I have designed a simple mechanismwhich will automatically discontinue the delivery of ink from thefountain whenever the impression cylinder is thrown out of action whilethe type bed or form still continues its movement. At the same time, Ihave provided means whereby the ink feed-roller may be put in operation,even with the impression cylinder set up and held at its highest point,to enable the form to be properly inked (as where the press has stoodidle over night) before sending any paper through the machine.

The invention consists of the parts and the construction and thecombination of parts as hereinafter more fully described and claimed,having reference to the accompanying drawings, in which Figure 1 is aside elevation of a part of a ress sufficient to show my invention, withthe feed roller taking ink. Fig. 2 is a front view in partial section ofthe feed-roller trip mechanism in the position of Fig. 1. Fig. 3 is aviewsimilar to Fig. 1 with the cylinder set up and the feed oroscillating roller tripped and inoperative. Fig. 41 is a view simi ar tothat of Fig. 2 viewed on Fig. 3.

In the drawings the novelty is indicated in full lines while the oldfeatures of the press are represented by dotted lines.

A represents the frame of a printing press and 2 the impression cylinderwhich is 1 adapted to rise and lower at each reciprocation of the typebed or form which is not shown as it forms no part of the presentinvention, but which slides back and forth on 1 suitable horizontaltracks on the frame A so as alternately to receive the ink from the formrollers, (also not shown) and to traverse the space beneath theimperssion cylinder 2 1 and print on the paper when the latter ispressed down onto it by the impression cylinder. The cylinder rises toallow the inked form to pass under it freely in one direction; the sheetbeing fed to the cylinder and the cylinder being lowered to press thesheet down on the form to print during the move ment of the form in theother direction. The cylinder is suitably mounted to rise and lowercoordinately with the reciprocating movement of the type bed or form.Usually the cylinder is carried on springs 4. and connected with rods 5which connect to blocks 6 on each side of the frame. The springs keepthe cylinder in normally elevated or set-up position out of contact withthe type bed. The cylinder is depressed by the operation of theeccentrics 7 on shaft 8, acting through the blocks 6 and rods 5 inopposition to the springs. When the cylinder 1s set-up in inoperativeposition shaft 8 is stationary.

9 is a cam shaft operated coordinately with the rest of the apparatusand carrying a cam 10 which engages at each revolution a roller 11 on anarm 11 of a rock shaft 12. The latter carries a second arm 13 to which arod 14 connects by a swivel joint. Rod 14 operates a bell-crank lever 15which carries the oscillating feed roller 16 which conveys ink from thefountain 17 to the distributing plate 3 by which the ink is delivered tothe form rollers. The rollers 3 are ink distributing rollers. The roller16 is maintained normally in contact with roller 17 by gravity and aspring 17.

My invention resides in a means for controlling the operations of thefeed roller 16 so that it will deliver ink to the distributing plate 3,or not deliver it, just as may be desired when the cylinder is set upand inoperative and the press continues to run. This function is hereshown as achieved by the inadapted when moved in one direction to pre-.

sent itself in the path of arm 11, being suitably supported on one sideagainst a fixed part of the press frame. WVhen the lever 18 is moveddown it leaves the arm 11 and the roller 16 free to operate. The stop ispreferably operated synchronously with the up and down movements of theimpression cylinder, and this synchronous movement is here shown aseffected through the medium.

of a block, an angular lever 19 fulcrumed. at

20 to be operable by the block, and a link 21 connecting the lever 19with the stop member 18. A s ring 22 having one end attached to a 'ixedpoint of support and the other to the lever 19 causes the latter toremain in contact with the cam projection 23 on block 6 so that thelever 19' travels up and down ordinarily in unison with the up and downmovement of the block resulting through the action of the eccentric 7.

In operation with. the press running and printing going on the lever 19is depressed each time the impression cylinder comes down and the stop18 is removed out of invterference with the arm 11 the movement of theseveral parts being so timed that when the cylinder and stop are inuppermost position as occurs between each impression, the operation ofthe roller 16 will not be interfered with. In other words, with theimression cylinder rising and lowering reguarly, the up-movement of thestop 18 will occur alternately with the back movement of the arm 11 sothat the stop will ordinarily and normally be out of the path of the arm11 a when the latter is in the position to allow roller 16 to contactwith the fountain roller 17. If, however, the impression cylinder isset-up in inoperative position and the movement of the eccentric shaft 8discontinued, the stop 18 will remain up, so that the next time the arm11 swings back it will engage the stop before roller 16 contacts withthe fountain roller 17, as indicated in Fig. 3. Although the cam shaft 9continues to revolve and the cam 10 will act at each revolution of theshaft 9 to rock the shaft 12 and oscillate roller 16, the arc ofoscillation of the roller 16 will be limited sufficiently, so that whilethe roller 16 may swing up each time to contact with the distributingplate 3, it will deliver no fresh ink.

In order to properly ink the form or get arm 11 A lever 24 fulcrumed at25 is connected at one end to lever 19 by a spring 26 which is somewhatstiffer than the spring 22. The other end of the lever 24 is operated bya rod 27 sliding in a guide 28 and having a suitable hand-hold 29 inconvenient reach of the operator. The rod 27 may be locked in anydesired position by a suitable means as the thumb-screw 30. At all time,except when it is desired to get up color, the rod 27 is pushed down andlocked so that the spring 26 will be inert and allow the spring 22 tomaintain the lever 19*- snug up against the block 6. With the cylinder 2set-up and it being desired to get up color the operator simply loosensthe locking device 30 and raises on the rod 27 to pull down on lever 19*and free the stop 18 from interference with the arm 11 A resilientconnection, such as spring 26 between levers 24 and 19 is employed forthe reason it might happen that at the moment when the operator lifted011 the rod 27, the arm 11" would be jammed tight against the stop 18and hold the latter for an instant. The spring 26 allows the operator inthe event of such an occurrence to lift up on'the rod 27 and lock it inposition. The next moment when the cam 10 strikes the roller 11 to freethe stop, the spring 26 which is stiffer than the spring 22 will pullthe stop down and allow the oscillating roller 16 to assume the positionshown in Fig. 1 and to take ink from the fountain.

It is possible that variousmodifications in my invention may be madewithout departing from the principle thereof, and I do not wish to beunderstood as limiting myself to my specific construction beyond what isrequired by a reasonable interpretation of my claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is

1. In ink feed trip mechanism, the combination of a cylinder having aregularly recurrent reciprocating movement transverse to its axis, afountain roller, an oscillating roller, means independent of thecylinder for operating the oscillating roller, and means operative bythe cylinder during its regularly recurrent transverse movements forautomatically tripping the oscillating roller.

2. In ink feed trip mechanism, the combination of a cylinder having aregularly recurrent reciprocating movement transverse to its axis, afountain roller, a feed roller, means independent of the cylinder foroperating the feed roller, means operative by the cylinder during itsregularly recurrent transverse movements for automatically tripping thefeed roller, and means for placing said last-named means out ofoperative position with said cylinder.

3. In a printing press, the combination with the impression-formingmechanism, the

ink-fountain, the oscillating roller, and means to operate the latter,of means including a pivoted stop-member operative by theimpressionrforming mechanism for tripping the oscillating roller todiscontinue the delivery of ink from the fountain, and means for placingsaid stop member in inoperative position with said impression-formingmechanism to permit the delivery of ink independent of saidimpression-formingmechanism.

4. In a printing press, the combination of a cylinder mounted to have alimited regularly recurrent reciprocating movement transverse to itsaxis, a fountain, an oscillating roller, means for operating saidroller, a stop member arranged to interrupt the operations of said meansfor operating the oscillatingroller, and means for operating saidstopmember synchronously with the regularly recurrent transversemovements of said cylinder.

5. In a printing press, the combination of a cylinder mounted to have alimited regularly. recurrent reciprocating movement transverse to itsaxis, a fountain, an oscillating roller, means for operating saidroller, a stop member arranged to interrupt the operations of said meansfor operating the oscillating roller, means for operating saidstopmember synchronously with the regularly recurrent transversemovements of said cylinder, and means for placing said stop member ininoperative position with the cylinder.

6. In a printing press, the combination of a cylinder mounted toreciprocate in a direction transverse to its axis, a fountain, anoscillating roller, means including a rockerarm to actuate said roller,a pivoted stop member interposable in the path of said rocker-arm, meansoperative by the cylinder for operating said stop-member, and meanshaving resilient connections with said stopmember for placing the latterin inoperative position.

7. In a printing press, in combination, an ink feed trip mechanismcomprising a movable power-actuated stop member; a mem ber arranged tobe moved by the operator for moving said stop member into inoperativeposition; and a resilient connection between said stop member and saidother mem ber.

8. In a printing press, in combination, ink feed mechanism; a movablestop member adapted to render said feed mechanism inoperative; means formoving said stop member into operative position; automatic means formoving said stop member into inoperative position; and a device arrangedto be operated by the operator for placing said stop member ininoperative position.

9. In a printing press, in combination, ink feed mechanism; a movablestop member adapted to render said ink feed mechanism inoperative; aspring tending to move said stop member into operative position; meansfor positively moving said stop member out of operative position; andmeans arranged to be operated by the operator for moving said stopmember out of operative position, said last mentioned means including aresilient connection.

10. In a printing press, in combination, a cylinder; means forreciprocating said cylinder; a block moving with said reciprocatingmeans; a fountain; an inking roller; a spring for moving said rollerinto communication with said fountain; a rocker arm for withdrawing saidroller, from said fountain; means for rocking said rocker arm; a pivotedstop arm adapted to lie in the path of said rocker arm to shorten itsspring-actuated movement; a spring tending to move said stop arm intooperative position; a lever engaged by said block and connected withsaid stop arm for moving said stop arm into inoperative position; amember arranged to be moved by the operator for moving said stop arminto inoperative position; and a spring connecting said member with saidstop arm, said last mentioned spring being stronger than the spring formoving said stop arm.

11. In a printing press, in combination, a cylinder; means forreciprocating said cylinder; a block moving with said reciprocatingmeans; a fountain; an inking roller; a spring for moving said rollerinto communication with said fountain a rocker arm for withdrawing saidroller from said fountain; means for rocking said rocker arm; a pivotedsto arm adapted to lie in the path of said rocker arm to shorten itsspring-actuated movement; a spring tending to move said stop arm intooperative position; and a lever engaged by sald block and-connected withsaid stop arm for moving said stop arm into ino erative position.

n testimonywhereof, I have hereunto set my hand in presence of twosubscribing witnesses.

CLARENCE L. JOHNSTON.

Witnesses: I

W. A. BRACE, GEO. G. POTTER.

